Bug 2455336 (CVE-2026-31405) - CVE-2026-31405 kernel: media: dvb-net: fix OOB access in ULE extension header tables
Summary: CVE-2026-31405 kernel: media: dvb-net: fix OOB access in ULE extension header...
Keywords:
Status: NEW
Alias: CVE-2026-31405
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-06 09:01 UTC by OSIDB Bzimport
Modified: 2026-04-06 11:43 UTC (History)
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Description OSIDB Bzimport 2026-04-06 09:01:36 UTC
In the Linux kernel, the following vulnerability has been resolved:

media: dvb-net: fix OOB access in ULE extension header tables

The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables
in handle_one_ule_extension() are declared with 255 elements (valid
indices 0-254), but the index htype is derived from network-controlled
data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When
htype equals 255, an out-of-bounds read occurs on the function pointer
table, and the OOB value may be called as a function pointer.

Add a bounds check on htype against the array size before either table
is accessed. Out-of-range values now cause the SNDU to be discarded.


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